package org.eclipse.swt.widgets; | |
/* | |
* (c) Copyright IBM Corp. 2000, 2001. | |
* All Rights Reserved | |
*/ | |
import org.eclipse.swt.internal.*; | |
import org.eclipse.swt.internal.motif.*; | |
import org.eclipse.swt.*; | |
import org.eclipse.swt.graphics.*; | |
import org.eclipse.swt.events.*; | |
/** | |
* Instances of this class are selectable user interface | |
* objects that allow the user to enter and modify text. | |
* <p> | |
* <dl> | |
* <dt><b>Styles:</b></dt> | |
* <dd>MULTI, SINGLE, READ_ONLY, WRAP</dd> | |
* <dt><b>Events:</b></dt> | |
* <dd>DefaultSelection, Modify, Verify</dd> | |
* </dl> | |
* </p> | |
* IMPORTANT: This class is <em>not</em> intended to be subclassed. | |
*/ | |
public class Text extends Scrollable { | |
char echoCharacter; | |
boolean ignoreChange; | |
String hiddenText; | |
XmTextVerifyCallbackStruct textVerify; | |
int drawCount; | |
public static final int LIMIT; | |
public static final String DELIMITER; | |
/* | |
* These values can be different on different platforms. | |
* Therefore they are not initialized in the declaration | |
* to stop the compiler from inlining. | |
*/ | |
static { | |
LIMIT = 0x7FFFFFFF; | |
DELIMITER = "\n"; | |
} | |
/** | |
* Constructs a new instance of this class given its parent | |
* and a style value describing its behavior and appearance. | |
* <p> | |
* The style value is either one of the style constants defined in | |
* class <code>SWT</code> which is applicable to instances of this | |
* class, or must be built by <em>bitwise OR</em>'ing together | |
* (that is, using the <code>int</code> "|" operator) two or more | |
* of those <code>SWT</code> style constants. The class description | |
* for all SWT widget classes should include a comment which | |
* describes the style constants which are applicable to the class. | |
* </p> | |
* | |
* @param parent a composite control which will be the parent of the new instance (cannot be null) | |
* @param style the style of control to construct | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> | |
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> | |
* </ul> | |
* | |
* @see SWT | |
* @see Widget#checkSubclass | |
* @see Widget#getStyle | |
*/ | |
public Text (Composite parent, int style) { | |
super (parent, checkStyle (style)); | |
} | |
/** | |
* Adds the listener to the collection of listeners who will | |
* be notified when the receiver's text is modified, by sending | |
* it one of the messages defined in the <code>ModifyListener</code> | |
* interface. | |
* | |
* @param listener the listener which should be notified | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
* | |
* @see ModifyListener | |
* @see #removeModifyListener | |
*/ | |
public void addModifyListener (ModifyListener listener) { | |
checkWidget(); | |
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); | |
TypedListener typedListener = new TypedListener (listener); | |
addListener (SWT.Modify, typedListener); | |
} | |
/** | |
* Adds the listener to the collection of listeners who will | |
* be notified when the control is selected, by sending | |
* it one of the messages defined in the <code>SelectionListener</code> | |
* interface. | |
* <p> | |
* <code>widgetSelected</code> is not called for texts. | |
* <code>widgetDefaultSelected</code> is typically called when ENTER is pressed in a single-line text. | |
* </p> | |
* | |
* @param listener the listener which should be notified | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
* | |
* @see SelectionListener | |
* @see #removeSelectionListener | |
* @see SelectionEvent | |
*/ | |
public void addSelectionListener(SelectionListener listener) { | |
checkWidget(); | |
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); | |
TypedListener typedListener = new TypedListener(listener); | |
addListener(SWT.Selection,typedListener); | |
addListener(SWT.DefaultSelection,typedListener); | |
} | |
/** | |
* Adds the listener to the collection of listeners who will | |
* be notified when the receiver's text is verified, by sending | |
* it one of the messages defined in the <code>VerifyListener</code> | |
* interface. | |
* | |
* @param listener the listener which should be notified | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
* | |
* @see VerifyListener | |
* @see #removeVerifyListener | |
*/ | |
public void addVerifyListener (VerifyListener listener) { | |
checkWidget(); | |
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); | |
TypedListener typedListener = new TypedListener (listener); | |
addListener (SWT.Verify, typedListener); | |
} | |
/** | |
* Appends a string. | |
* <p> | |
* The new text is appended to the text at | |
* the end of the widget. | |
* </p> | |
* | |
* @param string the string to be appended | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void append (String string) { | |
checkWidget(); | |
if (string == null) error (SWT.ERROR_NULL_ARGUMENT); | |
int position = OS.XmTextGetLastPosition (handle); | |
byte [] buffer = Converter.wcsToMbcs (getCodePage (), string, true); | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
OS.XmTextSetInsertionPosition (handle, position); | |
OS.XmTextInsert (handle, position, buffer); | |
position = OS.XmTextGetLastPosition (handle); | |
OS.XmTextSetInsertionPosition (handle, position); | |
display.setWarnings(warnings); | |
} | |
static int checkStyle (int style) { | |
if ((style & SWT.SINGLE) != 0) style &= ~(SWT.H_SCROLL | SWT.V_SCROLL); | |
if ((style & (SWT.SINGLE | SWT.MULTI)) != 0) return style; | |
if ((style & (SWT.H_SCROLL | SWT.V_SCROLL)) != 0) { | |
return style | SWT.MULTI; | |
} | |
return style | SWT.SINGLE; | |
} | |
/** | |
* Clears the selection. | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void clearSelection () { | |
checkWidget(); | |
int xDisplay = OS.XtDisplay (handle); | |
if (xDisplay == 0) return; | |
OS.XmTextClearSelection (handle, OS.XtLastTimestampProcessed (xDisplay)); | |
} | |
public Point computeSize (int wHint, int hHint, boolean changed) { | |
checkWidget(); | |
int width = wHint; | |
int height = hHint; | |
if (wHint == SWT.DEFAULT || hHint == SWT.DEFAULT) { | |
int ptr = OS.XmTextGetString (handle); | |
if (ptr == 0) return new Point (0, 0); | |
int size = OS.strlen (ptr); | |
if (size == 0) { | |
if (hHint == SWT.DEFAULT) { | |
if ((style & SWT.SINGLE) != 0) { | |
height = getLineHeight (); | |
} else { | |
height = DEFAULT_HEIGHT; | |
} | |
} | |
if (wHint == SWT.DEFAULT) { | |
width = DEFAULT_WIDTH; | |
} | |
} else { | |
byte [] buffer = new byte [size + 1]; | |
OS.memmove (buffer, ptr, size); | |
int xmString = OS.XmStringParseText ( | |
buffer, | |
0, | |
OS.XmFONTLIST_DEFAULT_TAG, | |
OS.XmCHARSET_TEXT, | |
null, | |
0, | |
0); | |
if (hHint == SWT.DEFAULT) { | |
if ((style & SWT.SINGLE) != 0) { | |
height = getLineHeight (); | |
} else { | |
height = OS.XmStringHeight (fontList, xmString); | |
} | |
} | |
if (wHint == SWT.DEFAULT) width = OS.XmStringWidth(fontList, xmString); | |
OS.XmStringFree (xmString); | |
} | |
OS.XtFree (ptr); | |
} | |
if (horizontalBar != null) { | |
int [] argList1 = {OS.XmNheight, 0}; | |
OS.XtGetValues (horizontalBar.handle, argList1, argList1.length / 2); | |
height += argList1 [1] + 4; | |
} | |
if (verticalBar != null) { | |
int [] argList1 = {OS.XmNwidth, 0}; | |
OS.XtGetValues (verticalBar.handle, argList1, argList1.length / 2); | |
width += argList1 [1] + 4; | |
} | |
XRectangle rect = new XRectangle (); | |
OS.XmWidgetGetDisplayRect (handle, rect); | |
width += rect.x * 2; height += rect.y * 2; | |
if ((style & (SWT.MULTI | SWT.BORDER)) != 0) height++; | |
return new Point (width, height); | |
} | |
public Rectangle computeTrim (int x, int y, int width, int height) { | |
checkWidget(); | |
Rectangle trim = super.computeTrim(x, y, width, height); | |
XRectangle rect = new XRectangle (); | |
OS.XmWidgetGetDisplayRect (handle, rect); | |
trim.x -= rect.x; | |
trim.y -= rect.y; | |
trim.width += rect.x; | |
trim.height += rect.y; | |
if ((style & (SWT.MULTI | SWT.BORDER)) != 0) trim.height += 3; | |
return trim; | |
} | |
/** | |
* Copies the selected text. | |
* <p> | |
* The current selection is copied to the clipboard. | |
* </p> | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void copy () { | |
checkWidget(); | |
int xDisplay = OS.XtDisplay (handle); | |
if (xDisplay == 0) return; | |
OS.XmTextCopy (handle, OS.XtLastTimestampProcessed (xDisplay)); | |
} | |
void createHandle (int index) { | |
state |= HANDLE; | |
int [] argList1 = { | |
OS.XmNverifyBell, 0, | |
OS.XmNeditMode, (style & SWT.SINGLE) != 0 ? OS.XmSINGLE_LINE_EDIT : OS.XmMULTI_LINE_EDIT, | |
OS.XmNscrollHorizontal, (style & SWT.H_SCROLL) != 0 ? 1 : 0, | |
OS.XmNscrollVertical, (style & SWT.V_SCROLL) != 0 ? 1 : 0, | |
OS.XmNwordWrap, (style & SWT.WRAP) != 0 ? 1: 0, | |
OS.XmNeditable, (style & SWT.READ_ONLY) != 0 ? 0 : 1, | |
OS.XmNcursorPositionVisible, (style & SWT.READ_ONLY) != 0 && (style & SWT.SINGLE) != 0 ? 0 : 1, | |
// OS.XmNmarginWidth, 3, | |
// OS.XmNmarginHeight, 1, | |
OS.XmNancestorSensitive, 1, | |
}; | |
int parentHandle = parent.handle; | |
if ((style & SWT.SINGLE) != 0) { | |
handle = OS.XmCreateTextField (parentHandle, null, argList1, argList1.length / 2); | |
if (handle == 0) error (SWT.ERROR_NO_HANDLES); | |
int [] argList2 = new int [] {OS.XmNcursorPositionVisible, 0}; | |
OS.XtSetValues (handle, argList2, argList2.length / 2); | |
if ((style & SWT.BORDER) == 0) { | |
int [] argList3 = new int [] { | |
OS.XmNmarginHeight, 0, | |
OS.XmNshadowThickness, 0, | |
}; | |
OS.XtSetValues (handle, argList3, argList3.length / 2); | |
} | |
} else { | |
handle = OS.XmCreateScrolledText (parentHandle, null, argList1, argList1.length / 2); | |
if (handle == 0) error (SWT.ERROR_NO_HANDLES); | |
scrolledHandle = OS.XtParent (handle); | |
} | |
} | |
ScrollBar createScrollBar (int type) { | |
return createStandardBar (type); | |
} | |
/** | |
* Cuts the selected text. | |
* <p> | |
* The current selection is first copied to the | |
* clipboard and then deleted from the widget. | |
* </p> | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void cut () { | |
checkWidget(); | |
int xDisplay = OS.XtDisplay (handle); | |
if (xDisplay == 0) return; | |
OS.XmTextCut (handle, OS.XtLastTimestampProcessed (xDisplay)); | |
} | |
int defaultBackground () { | |
return getDisplay ().textBackground; | |
} | |
int defaultFont () { | |
return getDisplay ().textFont; | |
} | |
int defaultForeground () { | |
return getDisplay ().textForeground; | |
} | |
/** | |
* Gets the line number of the caret. | |
* <p> | |
* The line number of the caret is returned. | |
* </p> | |
* | |
* @return the line number | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public int getCaretLineNumber () { | |
checkWidget(); | |
return getLineNumber (OS.XmTextGetInsertionPosition (handle)); | |
} | |
/** | |
* Gets the location the caret. | |
* <p> | |
* The location of the caret is returned. | |
* </p> | |
* | |
* @return a point, the location of the caret | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public Point getCaretLocation () { | |
checkWidget(); | |
int position; | |
if (textVerify != null) { | |
position = textVerify.currInsert; | |
} else { | |
position = OS.XmTextGetInsertionPosition (handle); | |
} | |
short [] x = new short [1], y = new short [1]; | |
OS.XmTextPosToXY (handle, position, x, y); | |
return new Point (x [0], y [0] - getFontAscent ()); | |
} | |
/** | |
* Gets the position of the caret. | |
* <p> | |
* The character position of the caret is returned. | |
* </p> | |
* | |
* @return the position of the caret | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public int getCaretPosition () { | |
checkWidget(); | |
return OS.XmTextGetInsertionPosition (handle); | |
} | |
/** | |
* Gets the number of characters. | |
* | |
* @return number of characters in the widget | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public int getCharCount () { | |
checkWidget(); | |
return OS.XmTextGetLastPosition (handle); | |
} | |
/** | |
* Gets the double click enabled flag. | |
* <p> | |
* The double click flag enables or disables the | |
* default action of the text widget when the user | |
* double clicks. | |
* </p> | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public boolean getDoubleClickEnabled () { | |
checkWidget(); | |
int [] argList = {OS.XmNselectionArrayCount, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
return argList [1] != 1; | |
} | |
/** | |
* Gets the echo character. | |
* <p> | |
* The echo character is the character that is | |
* displayed when the user enters text or the | |
* text is changed by the programmer. | |
* </p> | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public char getEchoChar () { | |
checkWidget(); | |
return echoCharacter; | |
} | |
/** | |
* Gets the editable state. | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public boolean getEditable () { | |
checkWidget(); | |
/* | |
* Bug in MOTIF. For some reason, when XmTextGetEditable () is called | |
* from inside an XmNvalueChangedCallback or XmNModifyVerifyCallback, | |
* it always returns TRUE. Calls to XmTextGetEditable () outside of | |
* these callbacks return the correct value. The fix is to query the | |
* resource directly instead of using the convenience function. | |
*/ | |
int [] argList = {OS.XmNeditable, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
return argList [1] != 0; | |
} | |
/** | |
* Gets the number of lines. | |
* | |
* @return the number of lines in the widget | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public int getLineCount () { | |
checkWidget(); | |
return getLineNumber (echoCharacter != '\0' ? hiddenText.length () : OS.XmTextGetLastPosition (handle)); | |
} | |
/** | |
* Gets the line delimiter. | |
* | |
* @return a string that is the line delimiter | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public String getLineDelimiter () { | |
checkWidget(); | |
return "\n"; | |
} | |
/** | |
* Gets the height of a line. | |
* | |
* @return the height of a row of text | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public int getLineHeight () { | |
checkWidget(); | |
return getFontHeight (); | |
} | |
int getLineNumber (int position) { | |
if (position == 0) return 0; | |
int count = 0, start = 0, page = 1024; | |
char [] buffer = new char [page + 1]; | |
/* | |
* Bug in Linux. For some reason, XmTextGetSubstringWcs () does | |
* not copy wchar_t characters into the buffer. Instead, it | |
* copies 4 bytes per character. This does not happen on other | |
* platforms such as AIX. The fix is to call XmTextGetSubstring () | |
* instead on Linux and rely on the fact that Metrolink Motif 1.2 | |
* does not support multibyte locales. | |
*/ | |
byte [] buffer1 = null; | |
if (OS.IsLinux) buffer1 = new byte [page + 1]; | |
int end = ((position + page - 1) / page) * page; | |
while (start < end) { | |
int length = page; | |
if (start + page > position) length = position - start; | |
if (echoCharacter != '\0') { | |
hiddenText.getChars (start, start + length, buffer, 0); | |
} else { | |
if (OS.IsLinux) { | |
OS.XmTextGetSubstring (handle, start, length, buffer1.length, buffer1); | |
for (int i=0; i<length; i++) buffer [i] = (char) buffer1 [i]; | |
} else { | |
OS.XmTextGetSubstringWcs (handle, start, length, buffer.length, buffer); | |
} | |
} | |
for (int i=0; i<length; i++) { | |
if (buffer [i] == '\n') count++; | |
} | |
start += page; | |
} | |
return count; | |
} | |
int getNavigationType () { | |
/* | |
* Bug in Motif. On Solaris only, the implementation | |
* of XtGetValues for XmText does not check for a zero | |
* pointer in the arg list and GP's. The fix is to | |
* allocate and free memory for the arg list value. | |
*/ | |
if ((style & SWT.SINGLE) != 0) { | |
return super.getNavigationType (); | |
} | |
int ptr = OS.XtMalloc (4); | |
if (ptr == 0) return OS.XmNONE; | |
int [] argList = {OS.XmNnavigationType, ptr}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
int [] buffer = new int [1]; | |
OS.memmove (buffer, ptr, 4); | |
OS.XtFree (ptr); | |
return buffer [0]; | |
} | |
/** | |
* Gets the position of the selected text. | |
* <p> | |
* Indexing is zero based. The range of | |
* a selection is from 0..N where N is | |
* the number of characters in the widget. | |
* </p> | |
* | |
* @return the start and end of the selection | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public Point getSelection () { | |
checkWidget(); | |
if (textVerify != null) { | |
return new Point (textVerify.startPos, textVerify.endPos); | |
} | |
int [] start = new int [1], end = new int [1]; | |
OS.XmTextGetSelectionPosition (handle, start, end); | |
if (start [0] == end [0]) { | |
start [0] = end [0] = OS.XmTextGetInsertionPosition (handle); | |
} | |
return new Point (start [0], end [0]); | |
} | |
/** | |
* Gets the number of selected characters. | |
* | |
* @return the number of selected characters. | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public int getSelectionCount () { | |
checkWidget(); | |
if (textVerify != null) { | |
return textVerify.endPos - textVerify.startPos; | |
} | |
int [] start = new int [1], end = new int [1]; | |
OS.XmTextGetSelectionPosition (handle, start, end); | |
return end [0] - start [0]; | |
} | |
/** | |
* Gets the selected text. | |
* | |
* @return the selected text | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public String getSelectionText () { | |
checkWidget(); | |
if (echoCharacter != '\0' || textVerify != null) { | |
Point selection = getSelection (); | |
return getText (selection.x, selection.y); | |
} | |
int ptr = OS.XmTextGetSelection (handle); | |
if (ptr == 0) return ""; | |
int length = OS.strlen (ptr); | |
byte [] buffer = new byte [length]; | |
OS.memmove (buffer, ptr, length); | |
OS.XtFree (ptr); | |
return new String (Converter.mbcsToWcs (getCodePage (), buffer)); | |
} | |
/** | |
* Gets the number of tabs. | |
* <p> | |
* Tab stop spacing is specified in terms of the | |
* space (' ') character. The width of a single | |
* tab stop is the pixel width of the spaces. | |
* </p> | |
* | |
* @return the number of tab characters | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public int getTabs () { | |
checkWidget(); | |
/* Tabs are not supported in MOTIF. */ | |
return 8; | |
} | |
/** | |
* Gets the widget text. | |
* <p> | |
* The text for a text widget is the characters in the widget. | |
* </p> | |
* | |
* @return the widget text | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public String getText () { | |
checkWidget(); | |
if (echoCharacter != '\0') return hiddenText; | |
int ptr = OS.XmTextGetString (handle); | |
if (ptr == 0) return ""; | |
int length = OS.strlen (ptr); | |
byte [] buffer = new byte [length]; | |
OS.memmove (buffer, ptr, length); | |
OS.XtFree (ptr); | |
return new String (Converter.mbcsToWcs (getCodePage (), buffer)); | |
} | |
/** | |
* Gets a range of text. | |
* <p> | |
* Indexing is zero based. The range of | |
* a selection is from 0..N-1 where N is | |
* the number of characters in the widget. | |
* </p> | |
* | |
* @param start the start of the range | |
* @param end the end of the range | |
* @return the range of text | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public String getText (int start, int end) { | |
checkWidget(); | |
int numChars = end - start + 1; | |
if (numChars < 0 || start < 0) return ""; | |
if (echoCharacter != '\0') { | |
return hiddenText.substring (start, Math.min (hiddenText.length (), end)); | |
} | |
int length = (numChars * 4 /* MB_CUR_MAX */) + 1; | |
byte [] buffer = new byte [length]; | |
int code = OS.XmTextGetSubstring (handle, start, numChars, length, buffer); | |
if (code == OS.XmCOPY_FAILED) return ""; | |
char [] unicode = Converter.mbcsToWcs (getCodePage (), buffer); | |
if (code == OS.XmCOPY_TRUNCATED) { | |
numChars = OS.XmTextGetLastPosition (handle) - start; | |
} | |
return new String (unicode, 0, numChars); | |
} | |
/** | |
* Returns the maximum number of characters that the receiver is capable of holding. | |
* <p> | |
* If this has not been changed by <code>setTextLimit()</code>, | |
* it will be the constant <code>Text.LIMIT</code>. | |
* </p> | |
* | |
* @return the text limit | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public int getTextLimit () { | |
checkWidget(); | |
return OS.XmTextGetMaxLength (handle); | |
} | |
/** | |
* Returns the zero-relative index of the line which is currently | |
* at the top of the receiver. | |
* <p> | |
* This index can change when lines are scrolled or new lines are added or removed. | |
* </p> | |
* | |
* @return the index of the top line | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public int getTopIndex () { | |
checkWidget(); | |
if ((style & SWT.SINGLE) != 0) return 0; | |
if (scrolledHandle == 0) return 0; | |
int [] argList1 = {OS.XmNverticalScrollBar, 0}; | |
OS.XtGetValues (scrolledHandle, argList1, argList1.length / 2); | |
if (argList1 [1] == 0) return 0; | |
int [] argList2 = {OS.XmNvalue, 0}; | |
OS.XtGetValues (argList1 [1], argList2, argList2.length / 2); | |
return argList2 [1]; | |
} | |
/** | |
* Gets the top pixel. | |
* <p> | |
* The top pixel is the pixel position of the line | |
* that is currently at the top of the widget. On | |
* some platforms, a text widget can be scrolled by | |
* pixels instead of lines so that a partial line | |
* is displayed at the top of the widget. | |
* </p><p> | |
* The top pixel changes when the widget is scrolled. | |
* The top pixel does not include the widget trimming. | |
* </p> | |
* | |
* @return the pixel position of the top line | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public int getTopPixel () { | |
checkWidget(); | |
return getTopIndex () * getLineHeight (); | |
} | |
boolean getWrap () { | |
checkWidget(); | |
int [] argList = {OS.XmNwordWrap, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
return argList [1] != 0; | |
} | |
void hookEvents () { | |
super.hookEvents (); | |
int windowProc = getDisplay ().windowProc; | |
OS.XtAddCallback (handle, OS.XmNactivateCallback, windowProc, SWT.DefaultSelection); | |
OS.XtAddCallback (handle, OS.XmNvalueChangedCallback, windowProc, SWT.Modify); | |
OS.XtAddCallback (handle, OS.XmNmodifyVerifyCallback, windowProc, SWT.Verify); | |
} | |
int inputContext () { | |
/* Answer zero. The text widget uses the default MOTIF input context. */ | |
return 0; | |
} | |
/** | |
* Inserts a string. | |
* <p> | |
* The old selection is replaced with the new text. | |
* </p> | |
* | |
* @param string the string | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void insert (String string) { | |
checkWidget(); | |
if (string == null) error (SWT.ERROR_NULL_ARGUMENT); | |
int [] start = new int [1], end = new int [1]; | |
OS.XmTextGetSelectionPosition (handle, start, end); | |
if (start [0] == end [0]) { | |
start [0] = end [0] = OS.XmTextGetInsertionPosition (handle); | |
} | |
byte [] buffer = Converter.wcsToMbcs (getCodePage (), string, true); | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
OS.XmTextReplace (handle, start [0], end [0], buffer); | |
int position = start [0] + buffer.length - 1; | |
OS.XmTextSetInsertionPosition (handle, position); | |
display.setWarnings (warnings); | |
} | |
/** | |
* Pastes text from clipboard. | |
* <p> | |
* The selected text is deleted from the widget | |
* and new text inserted from the clipboard. | |
* </p> | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void paste () { | |
checkWidget(); | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
/* | |
* Bug in Motif. Despite the fact that the documentation | |
* claims that XmText functions work for XmTextFields, when | |
* a text field is passed to XmTextPaste, Motif segment faults. | |
* The fix is to call XmTextFieldPaste instead. | |
*/ | |
if ((style & SWT.SINGLE) != 0) { | |
OS.XmTextFieldPaste (handle); | |
} else { | |
OS.XmTextPaste (handle); | |
} | |
display.setWarnings (warnings); | |
} | |
int processFocusIn () { | |
super.processFocusIn (); | |
// widget could be disposed at this point | |
if (handle == 0) return 0; | |
if ((style & SWT.READ_ONLY) != 0) return 0; | |
if ((style & SWT.MULTI) != 0) return 0; | |
int [] argList = {OS.XmNcursorPositionVisible, 1}; | |
OS.XtSetValues (handle, argList, argList.length / 2); | |
return 0; | |
} | |
int processFocusOut () { | |
super.processFocusOut (); | |
// widget could be disposed at this point | |
if (handle == 0) return 0; | |
if ((style & SWT.READ_ONLY) != 0) return 0; | |
if ((style & SWT.MULTI) != 0) return 0; | |
int [] argList = {OS.XmNcursorPositionVisible, 0}; | |
OS.XtSetValues (handle, argList, argList.length / 2); | |
return 0; | |
} | |
int processIMEFocusIn () { | |
return 0; | |
} | |
int processIMEFocusOut () { | |
return 0; | |
} | |
int processModify (int callData) { | |
if (!ignoreChange) super.processModify (callData); | |
return 0; | |
} | |
int processVerify (int callData) { | |
super.processVerify (callData); | |
if (echoCharacter == '\0' && !hooks (SWT.Verify)) return 0; | |
XmTextVerifyCallbackStruct textVerify = new XmTextVerifyCallbackStruct (); | |
OS.memmove (textVerify, callData, XmTextVerifyCallbackStruct.sizeof); | |
XmTextBlockRec textBlock = new XmTextBlockRec (); | |
OS.memmove (textBlock, textVerify.text, XmTextBlockRec.sizeof); | |
byte [] buffer = new byte [textBlock.length]; | |
OS.memmove (buffer, textBlock.ptr, textBlock.length); | |
String codePage = getCodePage (); | |
String text = new String (Converter.mbcsToWcs (codePage, buffer)); | |
String newText = text; | |
if (!ignoreChange) { | |
Event event = new Event (); | |
if (textVerify.event != 0) { | |
XKeyEvent xEvent = new XKeyEvent (); | |
OS.memmove (xEvent, textVerify.event, XKeyEvent.sizeof); | |
event.time = xEvent.time; | |
setKeyState (event, xEvent); | |
} | |
event.start = textVerify.startPos; | |
event.end = textVerify.endPos; | |
event.doit = textVerify.doit == 1; | |
event.text = text; | |
sendEvent (SWT.Verify, event); | |
newText = event.text; | |
textVerify.doit = (byte) ((event.doit && newText != null) ? 1 : 0); | |
} | |
if (newText != null) { | |
if (echoCharacter != '\0' && (textVerify.doit != 0)) { | |
String prefix = hiddenText.substring (0, textVerify.startPos); | |
String suffix = hiddenText.substring (textVerify.endPos, hiddenText.length ()); | |
hiddenText = prefix + newText + suffix; | |
char [] charBuffer = new char [newText.length ()]; | |
for (int i=0; i<charBuffer.length; i++) { | |
charBuffer [i] = echoCharacter; | |
} | |
newText = new String (charBuffer); | |
} | |
if (newText != text) { | |
byte [] buffer2 = Converter.wcsToMbcs (codePage, newText, true); | |
int length = buffer2.length; | |
int ptr = OS.XtMalloc (length); | |
OS.memmove (ptr, buffer2, length); | |
textBlock.ptr = ptr; | |
textBlock.length = buffer2.length - 1; | |
OS.memmove (textVerify.text, textBlock, XmTextBlockRec.sizeof); | |
} | |
} | |
OS.memmove (callData, textVerify, XmTextVerifyCallbackStruct.sizeof); | |
textVerify = null; | |
return 0; | |
} | |
void releaseWidget () { | |
super.releaseWidget (); | |
hiddenText = null; | |
textVerify = null; | |
} | |
/** | |
* Removes the listener from the collection of listeners who will | |
* be notified when the receiver's text is modified. | |
* | |
* @param listener the listener which should no longer be notified | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
* | |
* @see ModifyListener | |
* @see #addModifyListener | |
*/ | |
public void removeModifyListener (ModifyListener listener) { | |
checkWidget(); | |
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); | |
if (eventTable == null) return; | |
eventTable.unhook (SWT.Modify, listener); | |
} | |
/** | |
* Removes the listener from the collection of listeners who will | |
* be notified when the control is selected. | |
* | |
* @param listener the listener which should be notified | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
* | |
* @see SelectionListener | |
* @see #addSelectionListener | |
*/ | |
public void removeSelectionListener(SelectionListener listener) { | |
checkWidget(); | |
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); | |
if (eventTable == null) return; | |
eventTable.unhook(SWT.Selection, listener); | |
eventTable.unhook(SWT.DefaultSelection,listener); | |
} | |
/** | |
* Removes the listener from the collection of listeners who will | |
* be notified when the control is verified. | |
* | |
* @param listener the listener which should be notified | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
* | |
* @see VerifyListener | |
* @see #addVerifyListener | |
*/ | |
public void removeVerifyListener (VerifyListener listener) { | |
checkWidget(); | |
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); | |
if (eventTable == null) return; | |
eventTable.unhook (SWT.Verify, listener); | |
} | |
byte [] sendIMEKeyEvent (int type, XKeyEvent xEvent) { | |
/* | |
* Bug in Motif. On Solaris and Linux, XmImMbLookupString () clears | |
* the characters from the IME. This causes tht characters to be | |
* stolen from the text widget. The fix is to detect that the IME | |
* has been cleared and use XmTextInsert () to insert the stolen | |
* characters. This problem does not happen on AIX. | |
*/ | |
byte [] mbcs = super.sendIMEKeyEvent (type, xEvent); | |
if (mbcs == null || xEvent.keycode != 0) return null; | |
int [] unused = new int [1]; | |
byte [] buffer = new byte [2]; | |
int length = OS.XmImMbLookupString (handle, xEvent, buffer, buffer.length, unused, unused); | |
if (length != 0) return null; | |
int [] start = new int [1], end = new int [1]; | |
OS.XmTextGetSelectionPosition (handle, start, end); | |
if (start [0] == end [0]) { | |
start [0] = end [0] = OS.XmTextGetInsertionPosition (handle); | |
} | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
OS.XmTextReplace (handle, start [0], end [0], mbcs); | |
int position = start [0] + mbcs.length - 1; | |
OS.XmTextSetInsertionPosition (handle, position); | |
display.setWarnings (warnings); | |
return mbcs; | |
} | |
/** | |
* Selects all the text in the receiver. | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void selectAll () { | |
checkWidget(); | |
/* Clear the highlight before setting the selection. */ | |
int position = OS.XmTextGetLastPosition (handle); | |
// OS.XmTextSetHighlight (handle, 0, position, OS.XmHIGHLIGHT_NORMAL); | |
/* | |
* Bug in MOTIF. XmTextSetSelection () fails to set the | |
* selection when the receiver is not realized. The fix | |
* is to force the receiver to be realized by forcing the | |
* shell to be realized. If the receiver is realized before | |
* the shell, MOTIF fails to draw the text widget and issues | |
* lots of X BadDrawable errors. | |
*/ | |
if (!OS.XtIsRealized (handle)) getShell ().realizeWidget (); | |
/* Set the selection. */ | |
int xDisplay = OS.XtDisplay (handle); | |
if (xDisplay == 0) return; | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
OS.XmTextSetSelection (handle, 0, position, OS.XtLastTimestampProcessed (xDisplay)); | |
/* Force the i-beam to follow the highlight/selection. */ | |
OS.XmTextSetInsertionPosition (handle, 0); | |
display.setWarnings (warnings); | |
} | |
/** | |
* Sets the bounds. | |
*/ | |
public void setBounds (int x, int y, int width, int height) { | |
/* | |
* Bug in Motif. For some reason an Xm warning is | |
* output whenever a Text widget's caret is beyond | |
* the visible region during a resize. The fix is | |
* to temporarily turn off warnings below. | |
*/ | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
super.setBounds (x, y, width, height); | |
display.setWarnings(warnings); | |
/* | |
* Bug in Motif. When the receiver is a Text widget | |
* (not a Text Field) and is resized to be smaller than | |
* the inset that surrounds the text and the selection | |
* is set, the receiver scrolls to the left. When the | |
* receiver is resized larger, the text is not scrolled | |
* back. The fix is to detect this case and scroll the | |
* text back. | |
*/ | |
// inset := self inset. | |
// nWidth := self dimensionAt: XmNwidth. | |
// self noWarnings: [super resizeWidget]. | |
// nWidth > inset x ifTrue: [^self]. | |
// self showPosition: self topCharacter | |
} | |
/** | |
* Sets the double click enabled flag. | |
* <p> | |
* The double click flag enables or disables the | |
* default action of the text widget when the user | |
* double clicks. | |
* </p> | |
* | |
* @param doubleClick the new double click flag | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void setDoubleClickEnabled (boolean doubleClick) { | |
checkWidget(); | |
int [] argList = {OS.XmNselectionArrayCount, doubleClick ? 4 : 1}; | |
OS.XtSetValues (handle, argList, argList.length / 2); | |
} | |
/** | |
* Sets the echo character. | |
* <p> | |
* The echo character is the character that is | |
* displayed when the user enters text or the | |
* text is changed by the programmer. | |
* </p> | |
* | |
* @param echo the new echo character | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void setEchoChar (char echo) { | |
checkWidget(); | |
if (echoCharacter == echo) return; | |
String newText; | |
if (echo == 0) { | |
newText = hiddenText; | |
hiddenText = null; | |
} else { | |
newText = hiddenText = getText(); | |
} | |
echoCharacter = echo; | |
Point selection = getSelection(); | |
boolean oldValue = ignoreChange; | |
ignoreChange = true; | |
setText(newText); | |
setSelection(selection); | |
ignoreChange = oldValue; | |
} | |
/** | |
* Sets the editable state. | |
* | |
* @param editable the new editable state | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void setEditable (boolean editable) { | |
checkWidget(); | |
OS.XmTextSetEditable (handle, editable); | |
style &= ~SWT.READ_ONLY; | |
if (!editable) style |= SWT.READ_ONLY; | |
if ((style & SWT.MULTI) != 0) return; | |
int [] argList = {OS.XmNcursorPositionVisible, editable && hasFocus () ? 1 : 0}; | |
OS.XtSetValues (handle, argList, argList.length / 2); | |
} | |
/** | |
* Sets the redraw flag. | |
*/ | |
public void setRedraw (boolean redraw) { | |
checkWidget(); | |
if ((style & SWT.SINGLE) != 0) return; | |
if (redraw) { | |
if (--drawCount == 0) OS.XmTextEnableRedisplay(handle); | |
} else { | |
if (drawCount++ == 0) OS.XmTextDisableRedisplay(handle); | |
} | |
} | |
/** | |
* Sets the selection. | |
* <p> | |
* Indexing is zero based. The range of | |
* a selection is from 0..N where N is | |
* the number of characters in the widget. | |
* </p><p> | |
* Text selections are specified in terms of | |
* caret positions. In a text widget that | |
* contains N characters, there are N+1 caret | |
* positions, ranging from 0..N. This differs | |
* from other functions that address character | |
* position such as getText () that use the | |
* regular array indexing rules. | |
* </p> | |
* | |
* @param start new caret position | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the string is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void setSelection (int start) { | |
checkWidget(); | |
/* Clear the selection and highlight before moving the i-beam. */ | |
int xDisplay = OS.XtDisplay (handle); | |
if (xDisplay == 0) return; | |
int position = OS.XmTextGetLastPosition (handle); | |
int nStart = Math.min (Math.max (start, 0), position); | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
// OS.XmTextSetHighlight (handle, 0, position, OS.XmHIGHLIGHT_NORMAL); | |
OS.XmTextClearSelection (handle, OS.XtLastTimestampProcessed (xDisplay)); | |
/* Set the i-beam position. */ | |
OS.XmTextSetInsertionPosition (handle, nStart); | |
display.setWarnings (warnings); | |
} | |
/** | |
* Sets the selection. | |
* <p> | |
* Indexing is zero based. The range of | |
* a selection is from 0..N where N is | |
* the number of characters in the widget. | |
* </p><p> | |
* Text selections are specified in terms of | |
* caret positions. In a text widget that | |
* contains N characters, there are N+1 caret | |
* positions, ranging from 0..N. This differs | |
* from other functions that address character | |
* position such as getText () that use the | |
* usual array indexing rules. | |
* </p> | |
* | |
* @param start the start of the range | |
* @param end the end of the range | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the string is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void setSelection (int start, int end) { | |
checkWidget(); | |
/* Clear the highlight before setting the selection. */ | |
int position = OS.XmTextGetLastPosition (handle); | |
// OS.XmTextSetHighlight (handle, 0, position, OS.XmHIGHLIGHT_NORMAL); | |
/* | |
* Bug in MOTIF. XmTextSetSelection () fails to set the | |
* selection when the receiver is not realized. The fix | |
* is to force the receiver to be realized by forcing the | |
* shell to be realized. If the receiver is realized before | |
* the shell, MOTIF fails to draw the text widget and issues | |
* lots of X BadDrawable errors. | |
*/ | |
if (!OS.XtIsRealized (handle)) getShell ().realizeWidget (); | |
/* Set the selection. */ | |
int xDisplay = OS.XtDisplay (handle); | |
if (xDisplay == 0) return; | |
int nStart = Math.min (Math.max (Math.min (start, end), 0), position); | |
int nEnd = Math.min (Math.max (Math.max (start, end), 0), position); | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
OS.XmTextSetSelection (handle, nStart, nEnd, OS.XtLastTimestampProcessed (xDisplay)); | |
/* Force the i-beam to follow the highlight/selection. */ | |
OS.XmTextSetInsertionPosition (handle, nEnd); | |
display.setWarnings (warnings); | |
} | |
/** | |
* Sets the selection. | |
* <p> | |
* Indexing is zero based. The range of | |
* a selection is from 0..N where N is | |
* the number of characters in the widget. | |
* </p><p> | |
* Text selections are specified in terms of | |
* caret positions. In a text widget that | |
* contains N characters, there are N+1 caret | |
* positions, ranging from 0..N. This differs | |
* from other functions that address character | |
* position such as getText () that use the | |
* usual array indexing rules. | |
* </p> | |
* | |
* @param selection the point | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the string is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void setSelection (Point selection) { | |
checkWidget(); | |
if (selection == null) error (SWT.ERROR_NULL_ARGUMENT); | |
setSelection (selection.x, selection.y); | |
} | |
public void setSize (int width, int height) { | |
/* | |
* Bug in Motif. For some reason an Xm warning is | |
* output whenever a Text widget's caret is beyond | |
* the visible region during a resize. The fix is | |
* to temporarily turn off warnings below. | |
*/ | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
super.setSize (width, height); | |
display.setWarnings(warnings); | |
/* | |
* Bug in Motif. When the receiver is a Text widget | |
* (not a Text Field) and is resized to be smaller than | |
* the inset that surrounds the text and the selection | |
* is set, the receiver scrolls to the left. When the | |
* receiver is resized larger, the text is not scrolled | |
* back. The fix is to detect this case and scroll the | |
* text back. | |
*/ | |
// inset := self inset. | |
// nWidth := self dimensionAt: XmNwidth. | |
// self noWarnings: [super resizeWidget]. | |
// nWidth > inset x ifTrue: [^self]. | |
// self showPosition: self topCharacter | |
} | |
/** | |
* Sets the number of tabs. | |
* <p> | |
* Tab stop spacing is specified in terms of the | |
* space (' ') character. The width of a single | |
* tab stop is the pixel width of the spaces. | |
* </p> | |
* | |
* @param tabs the number of tabs | |
* | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void setTabs (int tabs) { | |
checkWidget(); | |
/* Do nothing. Tabs are not supported in MOTIF. */ | |
} | |
/** | |
* Sets the contents of the receiver to the given string. | |
* | |
* @param text the new text | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the string is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void setText (String string) { | |
checkWidget(); | |
if (string == null) error (SWT.ERROR_NULL_ARGUMENT); | |
byte [] buffer = Converter.wcsToMbcs (getCodePage (), string, true); | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
OS.XmTextSetString (handle, buffer); | |
OS.XmTextSetInsertionPosition (handle, 0); | |
display.setWarnings(warnings); | |
/* | |
* Bug in Linux. When the widget is multi-line | |
* it does not send a Modify to notify the application | |
* that the text has changed. The fix is to send the event. | |
*/ | |
if (OS.IsLinux && (style & SWT.MULTI) != 0) sendEvent (SWT.Modify); | |
} | |
/** | |
* Sets the maximum number of characters that the receiver | |
* is capable of holding to be the argument. | |
* | |
* @param limit new text limit | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_CANNOT_BE_ZERO - if the limit is zero</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void setTextLimit (int limit) { | |
checkWidget(); | |
if (limit == 0) error (SWT.ERROR_CANNOT_BE_ZERO); | |
OS.XmTextSetMaxLength (handle, limit); | |
} | |
/** | |
* Sets the zero-relative index of the line which is currently | |
* at the top of the receiver. This index can change when lines | |
* are scrolled or new lines are added and removed. | |
* | |
* @param index the index of the top item | |
* | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void setTopIndex (int index) { | |
checkWidget(); | |
if ((style & SWT.SINGLE) != 0) return; | |
if (scrolledHandle == 0) return; | |
int [] argList1 = {OS.XmNverticalScrollBar, 0}; | |
OS.XtGetValues (scrolledHandle, argList1, argList1.length / 2); | |
if (argList1 [1] == 0) return; | |
int [] argList2 = {OS.XmNvalue, 0}; | |
OS.XtGetValues (argList1 [1], argList2, argList2.length / 2); | |
OS.XmTextScroll (handle, index - argList2 [1]); | |
} | |
void setWrap (boolean wrap) { | |
checkWidget(); | |
int [] argList = {OS.XmNwordWrap, wrap ? 1 : 0}; | |
OS.XtSetValues (handle, argList, argList.length / 2); | |
} | |
/** | |
* Shows the selection. | |
* <p> | |
* If the selection is already showing | |
* in the receiver, this method simply returns. Otherwise, | |
* lines are scrolled until the selection is visible. | |
* </p> | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li> | |
* </ul> | |
* @exception SWTException <ul> | |
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> | |
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> | |
* </ul> | |
*/ | |
public void showSelection () { | |
checkWidget(); | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
int position = OS.XmTextGetInsertionPosition (handle); | |
OS.XmTextShowPosition (handle, position); | |
display.setWarnings (warnings); | |
} | |
int traversalCode (int key, XKeyEvent xEvent) { | |
int bits = super.traversalCode (key, xEvent); | |
if ((style & SWT.MULTI) != 0) { | |
bits &= ~SWT.TRAVERSE_RETURN; | |
if (key == OS.XK_Tab && xEvent != null) { | |
boolean next = (xEvent.state & OS.ShiftMask) == 0; | |
if (next && (xEvent.state & OS.ControlMask) == 0) { | |
bits &= ~(SWT.TRAVERSE_TAB_NEXT | SWT.TRAVERSE_TAB_PREVIOUS); | |
} | |
} | |
} | |
return bits; | |
} | |
} |